Sorry for possibly stupid question, but I'm new in MPS, I'd like to use it in my future projects, and it seems that I just can't get started with it because one of the steps in the tutorial doesn't work - the part when I create InputFieldReference concept, define an editor for it, compile the language and try it in sandbox model. According to the tutorial, now I can see named references to the input fields of a calculator - but I don't! I tried Ctrl+Space or just write in the name, but none of two worked. All I can choose is just basic Expressions.
Is there any known issue about this?
MPS Version: 2.5.1 (117.9271)